Manitowoc National Crane NBT40 Series, Руководство по обслуживанию

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CRANE INSTALLATION NBT40 SERVICE MANUAL
9-28
Published 8-01-2017 Control # 287-11
Figure 9-18 item Numbers
Initial Pump Start-up
1. Fill the reservoir with the proper hydraulic fluid to the
high-level mark on the reservoir sight gage.
2. Make sure the pump case is filled with clean, filtered
fluid identical to that used in the rest of the system. The
pump case must be full at all times to ensure proper
lubrication of internal components.
3. Verify that piping is completed and any inlet valves are
open to prevent cavitation or aeration of the pump.
4. Confirm that the direction of rotation of the prime mover
matches the pump installed.
5. Jog start the prime mover with the pump unloaded and
operate until the air is bled from the system.
6. Check the pump for external leakage, abnormal noise,
and vibration.
7. Adjust the throttle for the engine RPM and PTO ratio to
get proper pump shaft speed.
RCL CALIBRATION
After the crane has been installed and all electrical and
hydraulic connections are completed, calibrate the RCL.
Calibrate the RCL as described in the RCL manual titled
Calibration/Service Manual.
INITIAL CRANE RUN IN PROCEDURE
1. Put the unit in an open area where the crane can be run
through all functions.
2. Engage the PTO and do the following:
• Start the truck engine from the crane cab.
• Program the RCL.
• Run the truck engine at idle.
• Turn the crane power switch on and operate the
crane and outriggers though all of their functions at
least six (6) times to purge the cylinders of air.
• Operate the control valves slowly with the truck
engine at idle and cycle each cylinder through
its.complete stroke each time.
• Check to see that the movement of the outriggers
and boom correspond with the direction indicated
on switches and levers.
• Refer to the hydraulic and electrical sections and
hydraulic or electrical schematics in this manual.
NOTE: Add oil to reservoir as required to keep air from
reentering the system.
3. Set the throttle according to engine RPM and PTO ratio
to get the proper pump shaft speed.
4. After all the cylinders have been run through six
complete cycles, stow the crane with the outriggers
retracted. The oil level should be visible at the full mark
of the sight gage.
5. The lift and stability test must now be performed.
The Initial Crane Run in Procedure must be completed
before the stability test is started.
6. After testing is completed, check the torque on all
bearing, mounting and all cable clamp bolts.
7. Measure the overall height of the crane and truck. Post
the overall height measurement inside the truck cab to
inform the driver of the overall height.
STABILITY TEST
The purpose of the stability test is to verify that the rated load
can be lifted with an 85% tipping factor. With an 85% tipping
factor, the crane can lift a rated load and be at 85% of the
tipping condition or less.
A stability test must be performed on each completed unit to
determine the 85% tipping factor. Proceed as follows:
1. Put the test unit on a firm level surface. Place cribbing
under the outrigger floats if required.
2. With the boom in the rest, raise and level the machine on
the outriggers with all tires clear of the ground. See the
Operator’s Manual. Set the front jack (if equipped).
3. To determine if the machine is stable with an 85% tipping
factor, it is necessary to lift stability test loads at 1.176
times the rated load shown in the following table:
Item Description
1 Hydraulic Pump
2 Case Drain Hose
3 Hose - Swivel Port 3
4 Hose - Hydraulic Tank
5 Hose - Front O/R Valve, Port T
6 Hose - Front O/R Valve, Port P
7 Hose - Front O/R Valve, Port LS
8 Truck PTO
9 Relief Valve, 30 gpm, 3000psi
DANGER
Loads used for stability tests put the crane at the tipping
point. Keep the load close to the ground. Control of boom
position is critical. Do not swing test loads out past the
rated radius. If the crane starts to tip and the boom angle
is too low, the crane will overturn.
!
Reference Only